{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "The magnetic resonance image ( MRI ) showed increased signal intensity from the internal cerebral veins , vein of Galen , and straight sinus ."}
{"Disease": [], "Chemical": []}